content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.flowable.processors;
  
  import static org.junit.Assert.*;
  import static org.mockito.ArgumentMatchers.*;
  import static org.mockito.Mockito.*;
  
  import java.util.Arrays;
  import java.util.concurrent.*;
  import java.util.concurrent.atomic.AtomicReference;
  
  import org.junit.Test;
  import org.mockito.*;
  import org.reactivestreams.*;
  
  import io.reactivex.common.*;
  import io.reactivex.common.exceptions.TestException;
  import io.reactivex.common.functions.Function;
  import io.reactivex.flowable.*;
  import io.reactivex.flowable.internal.subscriptions.BooleanSubscription;
  import io.reactivex.flowable.subscribers.*;
  
  public class ReplayProcessorTest extends FlowableProcessorTest<Object> {
  
      private final Throwable testException = new Throwable();
  
      @Override
      protected FlowableProcessor<Object> create() {
          return ReplayProcessor.create();
      }
  
      @Test
      public void testCompleted() {
          ReplayProcessor<String> subject = ReplayProcessor.create();
  
          Subscriber<String> o1 = TestHelper.mockSubscriber();
          subject.subscribe(o1);
  
          subject.onNext("one");
          subject.onNext("two");
          subject.onNext("three");
          subject.onComplete();
  
          subject.onNext("four");
          subject.onComplete();
          subject.onError(new Throwable());
  
          assertCompletedSubscriber(o1);
  
          // assert that subscribing a 2nd time gets the same data
          Subscriber<String> o2 = TestHelper.mockSubscriber();
          subject.subscribe(o2);
          assertCompletedSubscriber(o2);
      }
  
      @Test
      public void testCompletedStopsEmittingData() {
          ReplayProcessor<Integer> channel = ReplayProcessor.create();
          Subscriber<Object> observerA = TestHelper.mockSubscriber();
          Subscriber<Object> observerB = TestHelper.mockSubscriber();
          Subscriber<Object> observerC = TestHelper.mockSubscriber();
          Subscriber<Object> observerD = TestHelper.mockSubscriber();
          TestSubscriber<Object> ts = new TestSubscriber<Object>(observerA);
  
          channel.subscribe(ts);
          channel.subscribe(observerB);
  
          InOrder inOrderA = inOrder(observerA);
          InOrder inOrderB = inOrder(observerB);
          InOrder inOrderC = inOrder(observerC);
          InOrder inOrderD = inOrder(observerD);
  
          channel.onNext(42);
  
          // both A and B should have received 42 from before subscription
          inOrderA.verify(observerA).onNext(42);
          inOrderB.verify(observerB).onNext(42);
  
          ts.dispose();
  
          // a should receive no more
          inOrderA.verifyNoMoreInteractions();
  
          channel.onNext(4711);
  
          // only be should receive 4711 at this point
          inOrderB.verify(observerB).onNext(4711);
  
          channel.onComplete();
  
          // B is subscribed so should receive onComplete
          inOrderB.verify(observerB).onComplete();
  
          channel.subscribe(observerC);
  
          // when C subscribes it should receive 42, 4711, onComplete
          inOrderC.verify(observerC).onNext(42);
          inOrderC.verify(observerC).onNext(4711);
          inOrderC.verify(observerC).onComplete();
  
          // if further events are propagated they should be ignored
          channel.onNext(13);
          channel.onNext(14);
          channel.onNext(15);
          channel.onError(new RuntimeException());
  
          // a new subscription should only receive what was emitted prior to terminal state onComplete
          channel.subscribe(observerD);
  
          inOrderD.verify(observerD).onNext(42);
          inOrderD.verify(observerD).onNext(4711);
          inOrderD.verify(observerD).onComplete();
  
          verify(observerA).onSubscribe((Subscription)notNull());
          verify(observerB).onSubscribe((Subscription)notNull());
          verify(observerC).onSubscribe((Subscription)notNull());
          verify(observerD).onSubscribe((Subscription)notNull());
          Mockito.verifyNoMoreInteractions(observerA);
          Mockito.verifyNoMoreInteractions(observerB);
          Mockito.verifyNoMoreInteractions(observerC);
          Mockito.verifyNoMoreInteractions(observerD);
  
      }
  
      @Test
      public void testCompletedAfterError() {
          ReplayProcessor<String> subject = ReplayProcessor.create();
  
          Subscriber<String> observer = TestHelper.mockSubscriber();
  
          subject.onNext("one");
          subject.onError(testException);
          subject.onNext("two");
          subject.onComplete();
          subject.onError(new RuntimeException());
  
          subject.subscribe(observer);
          verify(observer).onSubscribe((Subscription)notNull());
          verify(observer, times(1)).onNext("one");
          verify(observer, times(1)).onError(testException);
          verifyNoMoreInteractions(observer);
      }
  
      private void assertCompletedSubscriber(Subscriber<String> observer) {
          InOrder inOrder = inOrder(observer);
  
          inOrder.verify(observer, times(1)).onNext("one");
          inOrder.verify(observer, times(1)).onNext("two");
          inOrder.verify(observer, times(1)).onNext("three");
          inOrder.verify(observer, Mockito.never()).onError(any(Throwable.class));
          inOrder.verify(observer, times(1)).onComplete();
          inOrder.verifyNoMoreInteractions();
      }
  
      @Test
      public void testError() {
          ReplayProcessor<String> subject = ReplayProcessor.create();
  
          Subscriber<String> observer = TestHelper.mockSubscriber();
          subject.subscribe(observer);
  
          subject.onNext("one");
          subject.onNext("two");
          subject.onNext("three");
          subject.onError(testException);
  
          subject.onNext("four");
          subject.onError(new Throwable());
          subject.onComplete();
  
          assertErrorSubscriber(observer);
  
          observer = TestHelper.mockSubscriber();
          subject.subscribe(observer);
          assertErrorSubscriber(observer);
      }
  
      private void assertErrorSubscriber(Subscriber<String> observer) {
          verify(observer, times(1)).onNext("one");
          verify(observer, times(1)).onNext("two");
          verify(observer, times(1)).onNext("three");
          verify(observer, times(1)).onError(testException);
          verify(observer, Mockito.never()).onComplete();
      }
  
      @Test
      public void testSubscribeMidSequence() {
          ReplayProcessor<String> subject = ReplayProcessor.create();
  
          Subscriber<String> observer = TestHelper.mockSubscriber();
          subject.subscribe(observer);
  
          subject.onNext("one");
          subject.onNext("two");
  
          assertObservedUntilTwo(observer);
  
          Subscriber<String> anotherSubscriber = TestHelper.mockSubscriber();
          subject.subscribe(anotherSubscriber);
          assertObservedUntilTwo(anotherSubscriber);
  
          subject.onNext("three");
          subject.onComplete();
  
          assertCompletedSubscriber(observer);
          assertCompletedSubscriber(anotherSubscriber);
      }
  
      @Test
      public void testUnsubscribeFirstSubscriber() {
          ReplayProcessor<String> subject = ReplayProcessor.create();
  
          Subscriber<String> observer = TestHelper.mockSubscriber();
          TestSubscriber<String> ts = new TestSubscriber<String>(observer);
          subject.subscribe(ts);
  
          subject.onNext("one");
          subject.onNext("two");
  
          ts.dispose();
          assertObservedUntilTwo(observer);
  
          Subscriber<String> anotherSubscriber = TestHelper.mockSubscriber();
          subject.subscribe(anotherSubscriber);
          assertObservedUntilTwo(anotherSubscriber);
  
          subject.onNext("three");
          subject.onComplete();
  
          assertObservedUntilTwo(observer);
          assertCompletedSubscriber(anotherSubscriber);
      }
  
      private void assertObservedUntilTwo(Subscriber<String> observer) {
          verify(observer, times(1)).onNext("one");
          verify(observer, times(1)).onNext("two");
          verify(observer, Mockito.never()).onNext("three");
          verify(observer, Mockito.never()).onError(any(Throwable.class));
          verify(observer, Mockito.never()).onComplete();
      }
  
      @Test(timeout = 2000)
      public void testNewSubscriberDoesntBlockExisting() throws InterruptedException {
  
          final AtomicReference<String> lastValueForSubscriber1 = new AtomicReference<String>();
          Subscriber<String> observer1 = new DefaultSubscriber<String>() {
  
              @Override
              public void onComplete() {
  
              }
  
              @Override
              public void onError(Throwable e) {
  
              }
  
              @Override
              public void onNext(String v) {
                  System.out.println("observer1: " + v);
                  lastValueForSubscriber1.set(v);
              }
  
          };
  
          final AtomicReference<String> lastValueForSubscriber2 = new AtomicReference<String>();
          final CountDownLatch oneReceived = new CountDownLatch(1);
          final CountDownLatch makeSlow = new CountDownLatch(1);
          final CountDownLatch completed = new CountDownLatch(1);
          Subscriber<String> observer2 = new DefaultSubscriber<String>() {
  
              @Override
              public void onComplete() {
                  completed.countDown();
              }
  
              @Override
              public void onError(Throwable e) {
  
              }
  
              @Override
              public void onNext(String v) {
                  System.out.println("observer2: " + v);
                  if (v.equals("one")) {
                      oneReceived.countDown();
                  } else {
                      try {
                          makeSlow.await();
                      } catch (InterruptedException e) {
                          e.printStackTrace();
                      }
                      lastValueForSubscriber2.set(v);
                  }
              }
  
          };
  
          ReplayProcessor<String> subject = ReplayProcessor.create();
          subject.subscribe(observer1);
          subject.onNext("one");
          assertEquals("one", lastValueForSubscriber1.get());
          subject.onNext("two");
          assertEquals("two", lastValueForSubscriber1.get());
  
          // use subscribeOn to make this async otherwise we deadlock as we are using CountDownLatches
          subject.subscribeOn(Schedulers.newThread()).subscribe(observer2);
  
          System.out.println("before waiting for one");
  
          // wait until observer2 starts having replay occur
          oneReceived.await();
  
          System.out.println("after waiting for one");
  
          subject.onNext("three");
  
          System.out.println("sent three");
  
          // if subscription blocked existing subscribers then 'makeSlow' would cause this to not be there yet
          assertEquals("three", lastValueForSubscriber1.get());
  
          System.out.println("about to send onComplete");
  
          subject.onComplete();
  
          System.out.println("completed subject");
  
          // release
          makeSlow.countDown();
  
          System.out.println("makeSlow released");
  
          completed.await();
          // all of them should be emitted with the last being "three"
          assertEquals("three", lastValueForSubscriber2.get());
  
      }
      @Test
      public void testSubscriptionLeak() {
          ReplayProcessor<Object> replaySubject = ReplayProcessor.create();
  
          Disposable s = replaySubject.subscribe();
  
          assertEquals(1, replaySubject.subscriberCount());
  
          s.dispose();
  
          assertEquals(0, replaySubject.subscriberCount());
      }
  
      @Test(timeout = 1000)
      public void testUnsubscriptionCase() {
          ReplayProcessor<String> src = ReplayProcessor.create();
  
          for (int i = 0; i < 10; i++) {
              final Subscriber<Object> o = TestHelper.mockSubscriber();
              InOrder inOrder = inOrder(o);
              String v = "" + i;
              src.onNext(v);
              System.out.printf("Turn: %d%n", i);
              src.firstElement()
                  .flatMap(new Function<String, Flowable<String>>() {
  
                      @Override
                      public Flowable<String> apply(String t1) {
                          return Flowable.just(t1 + ", " + t1);
                      }
                  })
                  .subscribe(new DefaultSubscriber<String>() {
                      @Override
                      public void onNext(String t) {
                          System.out.println(t);
                          o.onNext(t);
                      }
  
                      @Override
                      public void onError(Throwable e) {
                          o.onError(e);
                      }
  
                      @Override
                      public void onComplete() {
                          o.onComplete();
                      }
                  });
              inOrder.verify(o).onNext("0, 0");
              inOrder.verify(o).onComplete();
              verify(o, never()).onError(any(Throwable.class));
          }
      }
      @Test
      public void testTerminateOnce() {
          ReplayProcessor<Integer> source = ReplayProcessor.create();
          source.onNext(1);
          source.onNext(2);
          source.onComplete();
  
          final Subscriber<Integer> o = TestHelper.mockSubscriber();
  
          source.subscribe(new DefaultSubscriber<Integer>() {
  
              @Override
              public void onNext(Integer t) {
                  o.onNext(t);
              }
  
              @Override
              public void onError(Throwable e) {
                  o.onError(e);
              }
  
              @Override
              public void onComplete() {
                  o.onComplete();
              }
          });
  
          verify(o).onNext(1);
          verify(o).onNext(2);
          verify(o).onComplete();
          verify(o, never()).onError(any(Throwable.class));
      }
  
      @Test
      public void testReplay1AfterTermination() {
          ReplayProcessor<Integer> source = ReplayProcessor.createWithSize(1);
  
          source.onNext(1);
          source.onNext(2);
          source.onComplete();
  
          for (int i = 0; i < 1; i++) {
              Subscriber<Integer> o = TestHelper.mockSubscriber();
  
              source.subscribe(o);
  
              verify(o, never()).onNext(1);
              verify(o).onNext(2);
              verify(o).onComplete();
              verify(o, never()).onError(any(Throwable.class));
          }
      }
      @Test
      public void testReplay1Directly() {
          ReplayProcessor<Integer> source = ReplayProcessor.createWithSize(1);
  
          Subscriber<Integer> o = TestHelper.mockSubscriber();
  
          source.onNext(1);
          source.onNext(2);
  
          source.subscribe(o);
  
          source.onNext(3);
          source.onComplete();
  
          verify(o, never()).onNext(1);
          verify(o).onNext(2);
          verify(o).onNext(3);
          verify(o).onComplete();
          verify(o, never()).onError(any(Throwable.class));
      }
  
      @Test
      public void testReplayTimestampedAfterTermination() {
          TestScheduler scheduler = new TestScheduler();
          ReplayProcessor<Integer> source = ReplayProcessor.createWithTime(1, TimeUnit.SECONDS, scheduler);
  
          source.onNext(1);
  
          scheduler.advanceTimeBy(1, TimeUnit.SECONDS);
  
          source.onNext(2);
  
          scheduler.advanceTimeBy(1, TimeUnit.SECONDS);
  
          source.onNext(3);
          source.onComplete();
  
          scheduler.advanceTimeBy(1, TimeUnit.SECONDS);
  
          Subscriber<Integer> o = TestHelper.mockSubscriber();
  
          source.subscribe(o);
  
          verify(o, never()).onNext(1);
          verify(o, never()).onNext(2);
          verify(o, never()).onNext(3);
          verify(o).onComplete();
          verify(o, never()).onError(any(Throwable.class));
      }
  
      @Test
      public void testReplayTimestampedDirectly() {
          TestScheduler scheduler = new TestScheduler();
          ReplayProcessor<Integer> source = ReplayProcessor.createWithTime(1, TimeUnit.SECONDS, scheduler);
  
          source.onNext(1);
  
          scheduler.advanceTimeBy(1, TimeUnit.SECONDS);
  
          Subscriber<Integer> o = TestHelper.mockSubscriber();
  
          source.subscribe(o);
  
          source.onNext(2);
  
          scheduler.advanceTimeBy(1, TimeUnit.SECONDS);
  
          source.onNext(3);
  
          scheduler.advanceTimeBy(1, TimeUnit.SECONDS);
  
          source.onComplete();
  
          scheduler.advanceTimeBy(1, TimeUnit.SECONDS);
  
          verify(o, never()).onError(any(Throwable.class));
          verify(o, never()).onNext(1);
          verify(o).onNext(2);
          verify(o).onNext(3);
          verify(o).onComplete();
      }
  
      // FIXME RS subscribers can't throw
  //    @Test
  //    public void testOnErrorThrowsDoesntPreventDelivery() {
  //        ReplaySubject<String> ps = ReplaySubject.create();
  //
  //        ps.subscribe();
  //        TestSubscriber<String> ts = new TestSubscriber<String>();
  //        ps.subscribe(ts);
  //
  //        try {
  //            ps.onError(new RuntimeException("an exception"));
  //            fail("expect OnErrorNotImplementedException");
  //        } catch (OnErrorNotImplementedException e) {
  //            // ignore
  //        }
  //        // even though the onError above throws we should still receive it on the other subscriber
  //        assertEquals(1, ts.errors().size());
  //    }
  
      // FIXME RS subscribers can't throw
  //    /**
  //     * This one has multiple failures so should get a CompositeException
  //     */
  //    @Test
  //    public void testOnErrorThrowsDoesntPreventDelivery2() {
  //        ReplaySubject<String> ps = ReplaySubject.create();
  //
  //        ps.subscribe();
  //        ps.subscribe();
  //        TestSubscriber<String> ts = new TestSubscriber<String>();
  //        ps.subscribe(ts);
  //        ps.subscribe();
  //        ps.subscribe();
  //        ps.subscribe();
  //
  //        try {
  //            ps.onError(new RuntimeException("an exception"));
  //            fail("expect OnErrorNotImplementedException");
  //        } catch (CompositeException e) {
  //            // we should have 5 of them
  //            assertEquals(5, e.getExceptions().size());
  //        }
  //        // even though the onError above throws we should still receive it on the other subscriber
  //        assertEquals(1, ts.getOnErrorEvents().size());
  //    }
  
      @Test
      public void testCurrentStateMethodsNormal() {
          ReplayProcessor<Object> as = ReplayProcessor.create();
  
          assertFalse(as.hasThrowable());
          assertFalse(as.hasComplete());
          assertNull(as.getThrowable());
  
          as.onNext(1);
  
          assertFalse(as.hasThrowable());
          assertFalse(as.hasComplete());
          assertNull(as.getThrowable());
  
          as.onComplete();
  
          assertFalse(as.hasThrowable());
          assertTrue(as.hasComplete());
          assertNull(as.getThrowable());
      }
  
      @Test
      public void testCurrentStateMethodsEmpty() {
          ReplayProcessor<Object> as = ReplayProcessor.create();
  
          assertFalse(as.hasThrowable());
          assertFalse(as.hasComplete());
          assertNull(as.getThrowable());
  
          as.onComplete();
  
          assertFalse(as.hasThrowable());
          assertTrue(as.hasComplete());
          assertNull(as.getThrowable());
      }
      @Test
      public void testCurrentStateMethodsError() {
          ReplayProcessor<Object> as = ReplayProcessor.create();
  
          assertFalse(as.hasThrowable());
          assertFalse(as.hasComplete());
          assertNull(as.getThrowable());
  
          as.onError(new TestException());
  
          assertTrue(as.hasThrowable());
          assertFalse(as.hasComplete());
          assertTrue(as.getThrowable() instanceof TestException);
      }
      @Test
      public void testSizeAndHasAnyValueUnbounded() {
          ReplayProcessor<Object> rs = ReplayProcessor.create();
  
          assertEquals(0, rs.size());
          assertFalse(rs.hasValue());
  
          rs.onNext(1);
  
          assertEquals(1, rs.size());
          assertTrue(rs.hasValue());
  
          rs.onNext(1);
  
          assertEquals(2, rs.size());
          assertTrue(rs.hasValue());
  
          rs.onComplete();
  
          assertEquals(2, rs.size());
          assertTrue(rs.hasValue());
      }
      @Test
      public void testSizeAndHasAnyValueEffectivelyUnbounded() {
          ReplayProcessor<Object> rs = ReplayProcessor.createUnbounded();
  
          assertEquals(0, rs.size());
          assertFalse(rs.hasValue());
  
          rs.onNext(1);
  
          assertEquals(1, rs.size());
          assertTrue(rs.hasValue());
  
          rs.onNext(1);
  
          assertEquals(2, rs.size());
          assertTrue(rs.hasValue());
  
          rs.onComplete();
  
          assertEquals(2, rs.size());
          assertTrue(rs.hasValue());
      }
  
      @Test
      public void testSizeAndHasAnyValueUnboundedError() {
          ReplayProcessor<Object> rs = ReplayProcessor.create();
  
          assertEquals(0, rs.size());
          assertFalse(rs.hasValue());
  
          rs.onNext(1);
  
          assertEquals(1, rs.size());
          assertTrue(rs.hasValue());
  
          rs.onNext(1);
  
          assertEquals(2, rs.size());
          assertTrue(rs.hasValue());
  
          rs.onError(new TestException());
  
          assertEquals(2, rs.size());
          assertTrue(rs.hasValue());
      }
      @Test
      public void testSizeAndHasAnyValueEffectivelyUnboundedError() {
          ReplayProcessor<Object> rs = ReplayProcessor.createUnbounded();
  
          assertEquals(0, rs.size());
          assertFalse(rs.hasValue());
  
          rs.onNext(1);
  
          assertEquals(1, rs.size());
          assertTrue(rs.hasValue());
  
          rs.onNext(1);
  
          assertEquals(2, rs.size());
          assertTrue(rs.hasValue());
  
          rs.onError(new TestException());
  
          assertEquals(2, rs.size());
          assertTrue(rs.hasValue());
      }
  
      @Test
      public void testSizeAndHasAnyValueUnboundedEmptyError() {
          ReplayProcessor<Object> rs = ReplayProcessor.create();
  
          rs.onError(new TestException());
  
          assertEquals(0, rs.size());
          assertFalse(rs.hasValue());
      }
      @Test
      public void testSizeAndHasAnyValueEffectivelyUnboundedEmptyError() {
          ReplayProcessor<Object> rs = ReplayProcessor.createUnbounded();
  
          rs.onError(new TestException());
  
          assertEquals(0, rs.size());
          assertFalse(rs.hasValue());
      }
  
      @Test
      public void testSizeAndHasAnyValueUnboundedEmptyCompleted() {
          ReplayProcessor<Object> rs = ReplayProcessor.create();
  
          rs.onComplete();
  
          assertEquals(0, rs.size());
          assertFalse(rs.hasValue());
      }
      @Test
      public void testSizeAndHasAnyValueEffectivelyUnboundedEmptyCompleted() {
          ReplayProcessor<Object> rs = ReplayProcessor.createUnbounded();
  
          rs.onComplete();
  
          assertEquals(0, rs.size());
          assertFalse(rs.hasValue());
      }
  
      @Test
      public void testSizeAndHasAnyValueSizeBounded() {
          ReplayProcessor<Object> rs = ReplayProcessor.createWithSize(1);
  
          assertEquals(0, rs.size());
          assertFalse(rs.hasValue());
  
          for (int i = 0; i < 1000; i++) {
              rs.onNext(i);
  
              assertEquals(1, rs.size());
              assertTrue(rs.hasValue());
          }
  
          rs.onComplete();
  
          assertEquals(1, rs.size());
          assertTrue(rs.hasValue());
      }
  
      @Test
      public void testSizeAndHasAnyValueTimeBounded() {
          TestScheduler ts = new TestScheduler();
          ReplayProcessor<Object> rs = ReplayProcessor.createWithTime(1, TimeUnit.SECONDS, ts);
  
          assertEquals(0, rs.size());
          assertFalse(rs.hasValue());
  
          for (int i = 0; i < 1000; i++) {
              rs.onNext(i);
              assertEquals(1, rs.size());
              assertTrue(rs.hasValue());
              ts.advanceTimeBy(2, TimeUnit.SECONDS);
              assertEquals(0, rs.size());
              assertFalse(rs.hasValue());
          }
  
          rs.onComplete();
  
          assertEquals(0, rs.size());
          assertFalse(rs.hasValue());
      }
      @Test
      public void testGetValues() {
          ReplayProcessor<Object> rs = ReplayProcessor.create();
          Object[] expected = new Object[10];
          for (int i = 0; i < expected.length; i++) {
              expected[i] = i;
              rs.onNext(i);
              assertArrayEquals(Arrays.copyOf(expected, i + 1), rs.getValues());
          }
          rs.onComplete();
  
          assertArrayEquals(expected, rs.getValues());
  
      }
      @Test
      public void testGetValuesUnbounded() {
          ReplayProcessor<Object> rs = ReplayProcessor.createUnbounded();
          Object[] expected = new Object[10];
          for (int i = 0; i < expected.length; i++) {
              expected[i] = i;
              rs.onNext(i);
              assertArrayEquals(Arrays.copyOf(expected, i + 1), rs.getValues());
          }
          rs.onComplete();
  
          assertArrayEquals(expected, rs.getValues());
  
      }
  
      @Test
      public void testBackpressureHonored() {
          ReplayProcessor<Integer> rs = ReplayProcessor.create();
          rs.onNext(1);
          rs.onNext(2);
          rs.onNext(3);
          rs.onComplete();
  
          TestSubscriber<Integer> ts = new TestSubscriber<Integer>(0L);
  
          rs.subscribe(ts);
  
          ts.request(1);
          ts.assertValue(1);
          ts.assertNotComplete();
          ts.assertNoErrors();
  
  
          ts.request(1);
          ts.assertValues(1, 2);
          ts.assertNotComplete();
          ts.assertNoErrors();
  
          ts.request(1);
          ts.assertValues(1, 2, 3);
          ts.assertComplete();
          ts.assertNoErrors();
      }
  
      @Test
      public void testBackpressureHonoredSizeBound() {
          ReplayProcessor<Integer> rs = ReplayProcessor.createWithSize(100);
          rs.onNext(1);
          rs.onNext(2);
          rs.onNext(3);
          rs.onComplete();
  
          TestSubscriber<Integer> ts = new TestSubscriber<Integer>(0L);
  
          rs.subscribe(ts);
  
          ts.request(1);
          ts.assertValue(1);
          ts.assertNotComplete();
          ts.assertNoErrors();
  
  
          ts.request(1);
          ts.assertValues(1, 2);
          ts.assertNotComplete();
          ts.assertNoErrors();
  
          ts.request(1);
          ts.assertValues(1, 2, 3);
          ts.assertComplete();
          ts.assertNoErrors();
      }
  
      @Test
      public void testBackpressureHonoredTimeBound() {
          ReplayProcessor<Integer> rs = ReplayProcessor.createWithTime(1, TimeUnit.DAYS, Schedulers.trampoline());
          rs.onNext(1);
          rs.onNext(2);
          rs.onNext(3);
          rs.onComplete();
  
          TestSubscriber<Integer> ts = new TestSubscriber<Integer>(0L);
  
          rs.subscribe(ts);
  
          ts.request(1);
          ts.assertValue(1);
          ts.assertNotComplete();
          ts.assertNoErrors();
  
  
          ts.request(1);
          ts.assertValues(1, 2);
          ts.assertNotComplete();
          ts.assertNoErrors();
  
          ts.request(1);
          ts.assertValues(1, 2, 3);
          ts.assertComplete();
          ts.assertNoErrors();
      }
  
      @Test
      public void createInvalidCapacity() {
          try {
              ReplayProcessor.create(-99);
              fail("Didn't throw IllegalArgumentException");
          } catch (IllegalArgumentException ex) {
              assertEquals("capacityHint > 0 required but it was -99", ex.getMessage());
          }
      }
  
      @Test
      public void createWithSizeInvalidCapacity() {
          try {
              ReplayProcessor.createWithSize(-99);
              fail("Didn't throw IllegalArgumentException");
          } catch (IllegalArgumentException ex) {
              assertEquals("maxSize > 0 required but it was -99", ex.getMessage());
          }
      }
  
      @Test
      public void createWithTimeAndSizeInvalidCapacity() {
          try {
              ReplayProcessor.createWithTimeAndSize(1, TimeUnit.DAYS, Schedulers.computation(), -99);
              fail("Didn't throw IllegalArgumentException");
          } catch (IllegalArgumentException ex) {
              assertEquals("maxSize > 0 required but it was -99", ex.getMessage());
          }
      }
  
      @Test
      public void hasSubscribers() {
          ReplayProcessor<Integer> rp = ReplayProcessor.create();
  
          assertFalse(rp.hasSubscribers());
  
          TestSubscriber<Integer> ts = rp.test();
  
          assertTrue(rp.hasSubscribers());
  
          ts.cancel();
  
          assertFalse(rp.hasSubscribers());
      }
  
      @Test
      public void peekStateUnbounded() {
          ReplayProcessor<Integer> rp = ReplayProcessor.create();
  
          rp.onNext(1);
  
          assertEquals((Integer)1, rp.getValue());
  
          assertEquals(1, rp.getValues()[0]);
      }
  
      @Test
      public void peekStateTimeAndSize() {
          ReplayProcessor<Integer> rp = ReplayProcessor.createWithTimeAndSize(1, TimeUnit.DAYS, Schedulers.computation(), 1);
  
          rp.onNext(1);
  
          assertEquals((Integer)1, rp.getValue());
  
          assertEquals(1, rp.getValues()[0]);
  
          rp.onNext(2);
  
          assertEquals((Integer)2, rp.getValue());
  
          assertEquals(2, rp.getValues()[0]);
  
          assertEquals((Integer)2, rp.getValues(new Integer[0])[0]);
  
          assertEquals((Integer)2, rp.getValues(new Integer[1])[0]);
  
          Integer[] a = new Integer[2];
          assertEquals((Integer)2, rp.getValues(a)[0]);
          assertNull(a[1]);
      }
  
      @Test
      public void peekStateTimeAndSizeValue() {
          ReplayProcessor<Integer> rp = ReplayProcessor.createWithTimeAndSize(1, TimeUnit.DAYS, Schedulers.computation(), 1);
  
          assertNull(rp.getValue());
  
          assertEquals(0, rp.getValues().length);
  
          assertNull(rp.getValues(new Integer[2])[0]);
  
          rp.onComplete();
  
          assertNull(rp.getValue());
  
          assertEquals(0, rp.getValues().length);
  
          assertNull(rp.getValues(new Integer[2])[0]);
  
          rp = ReplayProcessor.createWithTimeAndSize(1, TimeUnit.DAYS, Schedulers.computation(), 1);
          rp.onError(new TestException());
  
          assertNull(rp.getValue());
  
          assertEquals(0, rp.getValues().length);
  
          assertNull(rp.getValues(new Integer[2])[0]);
      }
  
      @Test
      public void capacityHint() {
          ReplayProcessor<Integer> rp = ReplayProcessor.create(8);
  
          for (int i = 0; i < 15; i++) {
              rp.onNext(i);
          }
          rp.onComplete();
  
          rp.test().assertResult(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14);
      }
  
      @Test
      public void subscribeCancelRace() {
          for (int i = 0; i < 500; i++) {
              final TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
  
              final ReplayProcessor<Integer> rp = ReplayProcessor.create();
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      rp.subscribe(ts);
                  }
              };
  
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      ts.cancel();
                  }
              };
  
              TestCommonHelper.race(r1, r2, Schedulers.single());
          }
      }
  
      @Test
      public void subscribeAfterDone() {
          ReplayProcessor<Integer> rp = ReplayProcessor.create();
          rp.onComplete();
  
          BooleanSubscription bs = new BooleanSubscription();
  
          rp.onSubscribe(bs);
  
          assertTrue(bs.isCancelled());
      }
  
      @Test
      public void subscribeRace() {
          for (int i = 0; i < 500; i++) {
              final ReplayProcessor<Integer> rp = ReplayProcessor.create();
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      rp.test();
                  }
              };
  
              TestCommonHelper.race(r1, r1, Schedulers.single());
          }
      }
  
      @Test
      public void cancelUpfront() {
          ReplayProcessor<Integer> rp = ReplayProcessor.create();
          rp.test();
          rp.test();
  
          TestSubscriber<Integer> ts = rp.test(0L, true);
  
          assertEquals(2, rp.subscriberCount());
  
          ts.assertEmpty();
      }
  
      @Test
      public void cancelRace() {
          for (int i = 0; i < 500; i++) {
  
              final ReplayProcessor<Integer> rp = ReplayProcessor.create();
              final TestSubscriber<Integer> ts1 = rp.test();
              final TestSubscriber<Integer> ts2 = rp.test();
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      ts1.cancel();
                  }
              };
  
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      ts2.cancel();
                  }
              };
  
              TestCommonHelper.race(r1, r2, Schedulers.single());
  
              assertFalse(rp.hasSubscribers());
          }
      }
  
      @Test
      public void sizeboundReplayError() {
          ReplayProcessor<Integer> rp = ReplayProcessor.createWithSize(2);
  
          rp.onNext(1);
          rp.onNext(2);
          rp.onNext(3);
          rp.onNext(4);
          rp.onError(new TestException());
  
          rp.test()
          .assertFailure(TestException.class, 3, 4);
      }
  
      @Test
      public void sizeAndTimeBoundReplayError() {
          ReplayProcessor<Integer> rp = ReplayProcessor.createWithTimeAndSize(1, TimeUnit.DAYS, Schedulers.single(), 2);
  
          rp.onNext(1);
          rp.onNext(2);
          rp.onNext(3);
          rp.onNext(4);
          rp.onError(new TestException());
  
          rp.test()
          .assertFailure(TestException.class, 3, 4);
      }
  
      @Test
      public void replayRequestRace() {
          for (int i = 0; i < 500; i++) {
  
              final ReplayProcessor<Integer> rp = ReplayProcessor.createWithTimeAndSize(1, TimeUnit.DAYS, Schedulers.single(), 2);
              final TestSubscriber<Integer> ts = rp.test(0L);
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      ts.request(1);
                  }
              };
  
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      rp.onNext(1);
                  }
              };
  
              TestCommonHelper.race(r1, r2, Schedulers.single());
          }
      }
  
      @Test
      public void timedSkipOld() {
          TestScheduler scheduler = new TestScheduler();
  
          ReplayProcessor<Integer> rp = ReplayProcessor.createWithTimeAndSize(1, TimeUnit.SECONDS, scheduler, 2);
  
          rp.onNext(1);
          scheduler.advanceTimeBy(1, TimeUnit.SECONDS);
  
          rp.test()
          .assertEmpty();
      }
  
      @Test
      public void takeSizeAndTime() {
          TestScheduler scheduler = new TestScheduler();
  
          ReplayProcessor<Integer> rp = ReplayProcessor.createWithTimeAndSize(1, TimeUnit.SECONDS, scheduler, 2);
  
          rp.onNext(1);
          rp.onNext(2);
          rp.onNext(3);
  
          rp
          .take(1)
          .test()
          .assertResult(2);
      }
  
      @Test
      public void takeSize() {
          ReplayProcessor<Integer> rp = ReplayProcessor.createWithSize(2);
  
          rp.onNext(1);
          rp.onNext(2);
          rp.onNext(3);
  
          rp
          .take(1)
          .test()
          .assertResult(2);
      }
  
      @Test
      public void reentrantDrain() {
          TestScheduler scheduler = new TestScheduler();
  
          final ReplayProcessor<Integer> rp = ReplayProcessor.createWithTimeAndSize(1, TimeUnit.SECONDS, scheduler, 2);
  
          TestSubscriber<Integer> ts = new TestSubscriber<Integer>() {
              @Override
              public void onNext(Integer t) {
                  if (t == 1) {
                      rp.onNext(2);
                  }
                  super.onNext(t);
              }
          };
  
          rp.subscribe(ts);
  
          rp.onNext(1);
          rp.onComplete();
  
          ts.assertResult(1, 2);
      }
  
      @Test
      public void reentrantDrainBackpressured() {
          TestScheduler scheduler = new TestScheduler();
  
          final ReplayProcessor<Integer> rp = ReplayProcessor.createWithTimeAndSize(1, TimeUnit.SECONDS, scheduler, 2);
  
          TestSubscriber<Integer> ts = new TestSubscriber<Integer>(1L) {
              @Override
              public void onNext(Integer t) {
                  if (t == 1) {
                      rp.onNext(2);
                  }
                  super.onNext(t);
              }
          };
  
          rp.subscribe(ts);
  
          rp.onNext(1);
          rp.onComplete();
  
          ts.request(1);
  
          ts.assertResult(1, 2);
      }
  
      @Test
      public void timedNoOutdatedData() {
          TestScheduler scheduler = new TestScheduler();
  
          ReplayProcessor<Integer> source = ReplayProcessor.createWithTime(2, TimeUnit.SECONDS, scheduler);
          source.onNext(1);
          source.onComplete();
  
          source.test().assertResult(1);
  
          source.test().assertResult(1);
  
          scheduler.advanceTimeBy(3, TimeUnit.SECONDS);
  
          source.test().assertResult();
      }
  
      @Test
      public void peekStateTimeAndSizeValueExpired() {
          TestScheduler scheduler = new TestScheduler();
          ReplayProcessor<Integer> rp = ReplayProcessor.createWithTime(1, TimeUnit.DAYS, scheduler);
  
          assertNull(rp.getValue());
          assertNull(rp.getValues(new Integer[2])[0]);
  
          rp.onNext(2);
  
          assertEquals((Integer)2, rp.getValue());
          assertEquals(2, rp.getValues()[0]);
  
          scheduler.advanceTimeBy(2, TimeUnit.DAYS);
  
          assertEquals(null, rp.getValue());
          assertEquals(0, rp.getValues().length);
          assertNull(rp.getValues(new Integer[2])[0]);
      }
  }
  